Vibration dampener



Juy i8, @4% H. A. sToRcH VIBRATION `DAMPENER File Aug.V 5, 1942 y@ ma M@ 5W ma. ,wy i M v ,4free/vs ns Patented July 18, 1944 VIBRATION DADIPENER Harold A. Storch, vFairview Village, Ohio, assignor. to Harris Products Company, Cleveland, Ohio,

a corporation of Ohio Application Augustl 5, 1942, serian No. tsaczo s claims. (ci. zie- 358) This invention relates to spring devices of the kind used to form shock absorbing and vibration dampenlng mountings for sensitive instruments and various other bodies and aims to provide an improved and simplified construction for devices 5 'oi this kind enabling such devices to be economi-A ,cally manufactured and assembled and permitting the easy installation and servicing oi the instruments or other bodies to`be supported.

- Another objectvoi the invention is to provide l an improved constructionfor a vibration dampener of this character wherein bumper means embodied in the device serves to limit the relative movement between the `yieldably connected members of the device. l

A further object of the invention is to provide an improved'constructionfor a vibration dampener in which-one'or" a pair of members yleldaoly connected by a body of rubber has stop elements thereon which cooperate with portions of the rubber body for limiting relative movement between the connected members. y

The invention may be further briey summerized as consisting in certain novel combinations and arrangements of parts hereinafter described and particularlyset out in the appended I claims.

the accompanying sheet of drawings,

"Fig, i is a plan view of a vibration dampener embodying my invention; 30

Fig, 2 is a sectional elevation taken through the device online Z-e oi Fig. i; l

Fig. 3 is another sectional elevation taken through the device on line 3 3 of Fig. 1;

Fig. e is a plan view showing the plate membei" ci the device in detached relation;

Fig. 5 is a detached plan. view of the spider member with portions thereof broken away;

Fig. d is e. detached pian view of the resilient 4 rubber body; and 4o Fig. i is a sectional elevation taken through a mounting assembly embodying a plurality of my vibration dampeners.

My vibration dampener comprises ingeneral a pair of cooperating members it and ii and a body or ring of resilient rubber l2 nexibly connecting such members. @ne member of the pair, in this instance the member lo, may be adapted ier connection with a bulkhead or other available support, and for convenience may be referred to It will be understood, of course, that the connections can be reversed, that is to say, the spider member Il can be connected with the bulkhead and the plate member lil can be connected with the instrument or other body to be mounted.

From the detailed description hereinafter given it. will be apparent that the rubber body l2 connects the plate and spider members so as to permit both a relative axial movement and a substantially universal relative rocking or tilting movement for absorbing shocks and Vibrations. Avvibration dampener of the kind herein disclosed may be applied to a varietyof uses but is especially suited for use on airplanes for mounting sensitive instruments or instrument-carrying panels so that the instruments will be protected from shocks and vibrations.r

Proceeding with the detailed description of my improved vibration dampener, it will be seen that the plate member it comprises a quadrangular Amember having an opening i3 lying wholly within its outer edges. The plate member may be formed of suitable material such as metal or plastic and may have openings l5 in the corner portions thereof by which this member may be-riveted or otherwise connected with the bulkhead or other support to which the device is to be applied. Projecting into the opening i3 yat a plurality of points are grooved segmental portions or hooklike elements l5 which are carried by or formed integral with the body ofthe plate member. in this instance I show the plate member provided with two of the elements le located in opposed or diametrical relation, but any desired number of these elements may be provided. As shown in Figs. 2 and 4, the elements i6 have somewhat the form of outwardly opening hooks providing arcuate grooves Il in which portions of the'rubber ring l2 engage. outwardly of the elements it the plate memberv i9 has arcuate shoulders le formed thereon which are engaged bythe outer edge of the rubber ring and conform with the latter as to radius of curvature.

The spidermember il has a hollow stem portion lf3 which extends through the opening I3 and 'carries al plurality of grooved integral projections 2o. These projections extend outwardly or laterally from the stem portion and are disposed in intermeshing relation with the grooved elements l5 of the plate member lli when the plate and spider members are in assembled relation, as shown in Figs. l to 3, inclusive. In this instance the spider member is provided with two of the grooved projections4 2li although the num- 5 ber may be increased or varied to correspond with thenumber of grooved elements I6 vprovided on the plate member.'

'Ihe ri'ng I2 is preferably formed of soft rubber, which may be either a natural or synthetic rubber, or may be formed of any other material having rubber-like characteristics. The rubber .ring I2 is the sole connecting means between the plate and spider'members and engages in the grooves 2| of the projections-20 as well as in the grooved elements I3. When the plate and spider members are in assembled relation, as shown in Fig. 1, clearance spaces exist between the intermeshing grooved elements I3 and 20 so as to permit relative rocking or tilting between the members. j

An important featureof my invention consists in the provision of means for limiting or checking the relative movement between the exibly connected plate and spider members III and For this purpose I provide one of 'the membersv with stop elements which extend in overlapping relation to the other member and cooperate vwith portions of the rubber ring which serve as bumper elements. In the vibration dampener here illustrated on'e pair of such stop elements are provided on the spider member and consists of laterally extending integral projections 22. located at one end'of the hollow stem portion I4. The stop elements 22 extend-in spaced overlapping relation vto the plate member I and to, axially extending bumper elements 23 provided on the rubber ring I2. 'The bumper elements 23 may comprise arcuate sections or extensions on the rubber ring which are engaged by one or both of the stop elements 22 when predetermined relative axial movement in one direction occurs between the spider member and the plate member or when predetermined relative tilting occurs between these members.

Another pair of stop elements may be pro- -vided on the spider member II by extending the lower arms 24 of the grooved projections 20 laterally so that these arms extend in overlapping relation to the sides or bar portions Illb of the plate member. At the points where the extended arms or stop elements 24 overlap the plate member I0 the rubber ring I2 is provided with laterally projecting sections or lugs'25 which formY In the. released or unloaded condition of my vibration dampener the bumper elements 26 of the rubber ring may bear against the under side l ofthe bar portions Illb of the plate member, but l when-the device is subjected to load. the spider member II is displaced axially a distance which depends on the magnitude of the load, and the bumper elements 2li then occupy a position spaced somewhat from the bar portions |01. as shown in Fig. 3. i Whenever a predetermined laxial movement in the opposite direction occurs botween the plate and spider members or when a predetermined relative tilting occurs, one or both of the bumper elements 25 Awill be subjected to compression between the stop elements 24 and the bar portions IIIb. In the construction just described either the extended arms 2 4 Aor the bar portions IIIb can be considered to be the stop elements, or both. pairs of these elements can be considered to be stop elements. Since the device embodies two pairs of the bumper elements spaced 90 apart, it will be seen that in addition "to cushioning and umiting excessive relative axial -spaces between the lntermeshing grooved projections I6 and 20. These teeth or internal projections -of the rubber ring *serve to hold the connected members against relative rotation so that the clearance spaces and the desired relative angular positions of the members will always be maintained.

My improved vibration dampener can be used 'singly or in multiple i'ormounting instruments or other bodies, but considerably greater ilexibiiity is obtained when a multiple arrangement 1 of the devices is used. In Fig. 7 I show a mounting formed by using two of my vibration dampeners together. Both of these dampeners are identical in construction with the vibration dampener shown in Figs. l to 3, inclusive, but the dampener 30 is reversed and rotated 90 with'respect to the dampener 3|. In 'this multiple mounting the spider members I Ia are rigidly ccnnected together by a clamping bolt 32 extending through the hollow stem portions thereof. The platemember IIla of the dampener 3| is connected with a bulkhead 33 or other support as by being mountedin an opening 33a and being riveted l or otherwise connected to the bulkhead. 'I'he connected in a similar manner with e member Ilia of the dampener 30. th plate In the multiple mount just described, it will be seen that by reversing the dampener 30 with respect to the dampener 3|, a desired arrangement is obtained by which the rubber ring of the dampener 30 will be subjected to tension and the rubberring of the dampener 3| will be subjected to compression whenl excessive downward movement of the load 34 occurs. On the other hand, when excessive upward movement of the load 34 occurs, the rubber king of the dampener 30 will instrument or instrument-carrying panely 34 is be subjected to compression and the rubber ring tions of the dampener 3| will be subjected to t This is a desirable ension arrangement in which compensation is automatically made and the rubber rings function more eiiicien and satis torily in absorbing shocks and vitlliations. fac' From the foregoing description and the accompanying drawing. it will now be readily understood thatV I have provided an improved vibration dampener which; although of very simple and economical construction, is very strong and durable and provides an eicient and satisfactory means for mounting instruments on airplanes and for various other purposes where the ability of the mounting means to absorb shocks and vibraseen t at excessive relative axial movements and exce e relative tilting movements in all directi s `will be limited and cushioned -by the. co-

operating stop and bumper elements embodied in I wish to be limited to the particular construction and arrangements of parts herein disclosed, but

4regard my invention as including such changes of prime consideration. It 'will -also bev from the spirit of the invention and the scope oi the appended claims.

and a body of yieldable rubber engagingv said projections and forming a resilient connection between said members, said rubber body having integral bumper elements thereon disposed around said spider` member and spaced apart substantially 90 and adapted to be engaged by the overlapping portions of said members for limiting relative movement between the members.

2. A vibration dampener comprising a plate member having an opening therein, a spider member extending through said opening, said members having projections extending linto intermeshing relation with clearance therebetween, and a rubber ring engaging said projections and forming a yieldable connection between said members, said spider member having pairs of laterally projecting stop elements spaced apart substantially 90 and extending into overlapping relation with portions ofsaid plate member, said rubber ring having bumper elements adapted to cooperate with said stop elements for limiting relative movement in all directions between said members.

3. A vibration dampenerlcomprising a' plate member having an opening therein, a spider member extending through said opening, said members having grooved projections extending into intermeshing relation in said opening, .and a rubber ring surrounding the spider member and engaging in said grooved projections for forming a resilient connection between said members, one of said members having pairs of stop portions spaced apart substantially 90 and extending laterally into overlapping relation with the other member and said rubber ring having bumper portions adapted to be subjected to compression by such overlapping portions for limiting relative ,movement between said members.

d. A vibration dampener comprising a pair of coaxial members having projecting portions in 3 intermeshing, relation with clearance therebetween and ilexibly connected by a resilient rubber body, one of said members having stop elements projecting laterally therefrom at substantially right angles to each other, said stop elements being spacedfaxially and extending into overlapping relation with the other 4member so as to lie above and below said other member and said rubber body having bumper portions adapted to cooperate with said stop elements for limiting relative movement between said members.

5. A vibration dampener comprising a plate member having an opening, a spider member having a stem portion extending through said opening, saidJ plate member and spider member having grooved portions in intermeshing relation in said opening, a rubber ring engaging in said grooved portions andv providing a resilient connection between said members, and means for limiting relative movement between said members comprising integral bumper elements on said ring and pairs of stop elements on said spider member adapted to cooperate with said bumper elements, said grooved' portions or the spider having armextensions in overlapping relation with said plate member and forming one pair of said stop elements and another pair of said stop elements being formed by lateral projections of the 'stem of the spider disposed at substantially right angles to said arm extensions and which also extend into overlapping relation to the plate member.

6. .A vibration dampener comprising a plate member havin-g an opening, a spider member having a stem portion extending through said opening, saidl plate member and spider member having grooved portions in intermeshing relation in said opening, a rubber ring engaging in said grooved portions and providing a resilient connection between said members, and means for limiting relative movement between said members comprising integral bumper elements on said ring and a pair oi stop elements on said spider'member adapted to cooperate with said bumper elements, said stop elements being formed by lateral extensions of the grooved portions of said spider member and which extend into overlapping relation with said plate member.

nano a. s'rpaon. 

